Machine for forming spirals from flat metal bars



(No Model.) 3 Sheets- Sheet 1..

L. GATHMANN.

MACHINE FORFORMING SPIRALS FROM FLAT METAL BARS; No. 390,357.- PatentedOct. 2, 1888.

UNITED STATES FATENT tries.

LOUIS GATHMANN, OF CHICAGO, ILLINOIS.

MACHINE FOR FORMING SPIRALS FROM FLAT METAL BARS.

SPECIFICATION forming part of Letters Patent No. 390,357, dated October2, 1888.

(No model.)

To all whom it may concern:

Be it known that I, LoUIs GATHMANN, a citizen of the United States ofAmerica, residing at Chicago, in the county of (look and State ofIllinois, have invented certain new and useful Improvements in Machinesfor Forming Spirals from FlatMetal Bars, of which the following is aspecification, reference being had therein to the accompanying drawings.

The nature of my invention relates to devices for spirally winding bandor flat iron, either for forming continuous conveyer-fiights or theseveral spirals to be afterward welded together for making strong tubes,and it has been my object to provide a machine in which said spirals canbe wound automatically to be continuous with the flights close againsteach other; and with that object in view my invention consists of thenovel devices and combinations of devices, hereinafter described andspecifically claimed.

In the accompanying drawings, Figure 1 represents a sectional plan viewof the entire machine; Fig. 2, a longitudinal vertical sec tion of themachine; Fig. 3, a transverse vertical section on line w w in Fig. 2;Fig. 4, a transverse vertical section on line 2; v in Fig. 2; Fig. 5, atransverse vertical section on line :0 m in Fig. 1; Fig. (i, a sectionon line y y in Fig. 2; Fig. 7, a section on line 2 z in Fig. 1.. Fig.8is a plan view of the winding faceplate, with the end of a bar coupledthereto for spirally coiling upon the shalt. Fig. 9 shows the bar afterbeing spirally wound in the machine; and Fig. 10, the same, somewhatstretched apart.

Corresponding reference-characters designate like parts in all thefigures of the draw- 5A denotes the frame of the machine, beingrectangular in shape, and B is the main shaft, having rigidly mounted adisk, (3, the hub of which forms one of the journals resting in a box,1, of the frame, while one end of shaft 13 is journaled in a box, 2, ofthe end of the frame. A spur gear-wheel, D, is mounted upon shaft B,meshing with the pinion E, mounted upon a shaft, 3, that is journaled inboxes 4. and 5 of the frame, and has also mounted upon its overhangingend a drivingpulley, 6. The forwardly-projecting end of shaft B ispassed through the hub23 of a disk,

F, having wings 7, with guide-groovcsiu their ends that engage the sideflanges of frame A to slide thereon longitudinally. The end of shaft Bhas a square socket for receiving the squared end ofa screw-bar, G, uponwhich is mounted a disk, H, that is screw-threaded in its hub, formingthe traveling nut on said screw-bar. The rim of disk His provided with aseries of screw-threaded sockets, and into either two suchdiametricallyopposite screwsockets are secured radial arms 8, eachhaving an eyed end for a set screw, 9, the points of which will supportsuch disk H while moving longitudinally over the frame sides, the lowerends of the set-screws 9 resting upon the upper plane surface of thesides of the frame, with freedom to move or slide thereon.

The end of screw G is center-punched for inserting the point of aset-screw, I, tapped through a bar, J, pivoted with one end to onecorner of the frame A by a bolt, 10, and being detachably secured withits opposite end to theother corner of frame A by a pin, 11, in a mannerthat, after removing such pin 11, the bar J can be swung rearward.Another set screw, 12, is tapped through the solid end of journal box 2,entering with its point the counter punched socket in the end of shaftB.

Both set-screws I and 12 are provided with hand-wheels 13 and 14c forturning the same, and may be provided with jam-nuts for bold ing suchscrewspn any desired position. The disk 0 has secured a pin, 15, that isonly sufficiently projecting from the face thereof to support the scantthickness of the plate K that is to be spirally wound, and is punched inits end for engaging such pin.

The disk F is arranged in its upper face for inserting a conical steelroller, 16, journaled in a shell, 17, that is adjusted by a set-screw,18. This roller is held in position horizontally by two plates, 19,fitted into a recess of disk F and secured therein by screws, andvertically this roller is held by a setscrew, 20, abutting with itspoint against the end of roller 16. The face of this roller 16 is toproject slightly beyond the face of disk F to bear against the bar Kwound past it.

To one side disk F has an extension form- (No Model.)' 2' Sheets-Sheet1.

A. GAULT.

ARTIFICIAL LEG.

No. 390,358. Patented Oct. 2, 1888".

QWITNESSESI J A INVENTOR:

fl K BY M 4 2 ATTORNEYS.

